Pixel structure and repairing method thereof

Abstract

A pixel structure disposed on a substrate and including a common line, a reserved line, a dielectric layer, two repair lines, an active device, and a pixel electrode is provided. The reserved line and the common line are disposed on the substrate and are covered by the dielectric layer. The repair lines are disposed on the dielectric layer, and each repair line has a first repairing region overlapped with the common line and a second repairing region overlapped with the reserved line. When the common line is open, the repair lines in the first and second repairing regions are connected with the common line and the reserved line, such that the common line, the repair lines, and the reserved line are electrically connected. After the common line, the repair lines, and the reserved line are connected, the above-mentioned pixel structure is effectively repaired.

1. A pixel structure disposed on a substrate and electrically connected with a scan line and a data line, comprising:
 a common line disposed on the substrate; 
 a reserved line disposed on the substrate and electrically insulated from the common line; 
 a dielectric layer disposed on the substrate and covering the common line and the reserved line; 
 two repair lines disposed on the dielectric layer, each of the repair lines comprising a first repairing region overlapped with the common line and a second repairing region overlapped with the reserved line; 
 an active device disposed on the substrate and electrically connected with the scan line and the data line; and 
 a pixel electrode disposed above the dielectric layer and electrically connected with the active device. 
 
     
     
       2. The pixel structure according to  claim 1 , further comprising a passivation layer disposed on the substrate to cover the scan line, the data line, the active device, the common line, the reserved line, the dielectric layer, and the repair line, so that the pixel electrode is disposed on the passivation layer. 
     
     
       3. The pixel structure according to  claim 1 , wherein the pixel electrode is disposed without covering the first repairing regions and the second repairing regions. 
     
     
       4. The pixel structure according to  claim 1 , wherein the common line and the reserved line are made of a same material. 
     
     
       5. The pixel structure according to  claim 1 , wherein the reserved line is disposed between the scan line and the common line. 
     
     
       6. The pixel structure according to  claim 1 , wherein the common line is disposed between the scan line and the reserved line. 
     
     
       7. The pixel structure according to  claim 1 , wherein the common line is substantially in a π shape. 
     
     
       8. The pixel structure according to  claim 1 , wherein the common line comprises an open-circuit region. 
     
     
       9. The pixel structure according to  claim 1 , wherein the first repairing regions and the second repairing regions respectively comprise at least one connection point, such that the first repairing regions and the second repairing regions are connected with the common line and the reserved line, respectively. 
     
     
       10. A display panel, comprising the pixel structure according to  claim 1 . 
     
     
       11. An electro-optical apparatus, comprising the display panel according to  claim 10 . 
     
     
       12. A method for repairing the pixel structure according to  claim 3 , when the common line is open, the repairing method comprising:
 connecting the repair lines with the common line in the first repairing regions and connecting the repair lines with the reserved line in the second repairing regions. 
 
     
     
       13. A method for repairing the pixel structure according to  claim 1 , when the common line is open, the repairing method comprising:
 separating the pixel electrode into two first blocks and one second block electrically insulated from the first blocks; 
 connecting the first blocks, the repair lines in the first repairing regions, and the common line; and 
 connecting the first blocks, the repair lines in the second repairing regions, and the reserved line. 
 
     
     
       14. A method of fabricating a pixel structure, comprising:
 forming a gate, a scan line, a common line, and a reserved line on a substrate, wherein the gate is electrically connected with the scan line; 
 forming a dielectric layer on the substrate to cover the gate, the scan line, the common line, and the reserved line; 
 forming a channel layer on the dielectric layer; 
 forming a source, a drain, and a data line on the dielectric layer, wherein the source and the drain cover a portion of the channel layer above two sides of the gate, and the source is electrically connected with the data line, such that the gate, the channel layer, the source, and the drain as an active device; 
 forming two repair lines on the dielectric layer, wherein each of the repair lines comprises a first repairing region overlapped with the common line and a second repairing region overlapped with the reserved line; and 
 forming a pixel electrode on the substrate, so that the pixel electrode is electrically connected with the drain. 
 
     
     
       15. The method of a pixel structure according to  claim 14 , further comprising forming a passivation layer on the substrate to cover the scan line, the data line, the active device, the common line, the reserved line, the dielectric layer, and the repair lines, such that the pixel electrode is formed on the passivation layer. 
     
     
       16. The method of a pixel structure according to  claim 15 , further comprising forming a contact opening in the passivation layer to expose a portion of the drain, so that the pixel electrode is electrically connected with the drain through the contact opening. 
     
     
       17. The method of a pixel structure according to  claim 14 , further comprising forming at least one connection point on the first repairing regions and the second repairing regions, such that the first repairing regions and the second repairing regions are connected with the common line and the reserved line, respectively. 
     
     
       18. A method of fabricating a display panel, comprising the method of fabricating a pixel structure according to  claim 14 . 
     
     
       19. A method of fabricating an electro-optical apparatus, comprising the method of fabricating a display panel according to  claim 18 . 
     
     
       20. A method of repairing a display panel, comprising the method of repairing a pixel structure according to  claim 12 . 
     
     
       21. A method of repairing a display panel, comprising the method of repairing a pixel structure according to  claim 13 . 
     
     
       22. A method of repairing an electro-optical apparatus, comprising the method of repairing a display panel according to  claim 20 . 
     
     
       23. A method of repairing an electro-optical apparatus, comprising the method of repairing a display panel according to  claim 21 .